Star Wars, Harry Potter, LEGO City and LEGO Friends.The calendars are packed with characters and and little builds, providing daily LEGO moments throughout December.Amazingly, the calendars are available to buy now, except for the City Advent Calendar which goes on sale on Wednesday, September 16th.If you want to get your hands on one in time for the festive season don't hang about as they're all bound to sell out quickly.Here's everything you need to know about the new Advent calendars.The